EP2582032A2 - Mittelspannungsmultizellenumrichter aus kaskadierten H-Brücken mit bidirektionaler Einspeisung der Zellen - Google Patents

Mittelspannungsmultizellenumrichter aus kaskadierten H-Brücken mit bidirektionaler Einspeisung der Zellen Download PDF

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Publication number
EP2582032A2
EP2582032A2 EP12181824.9A EP12181824A EP2582032A2 EP 2582032 A2 EP2582032 A2 EP 2582032A2 EP 12181824 A EP12181824 A EP 12181824A EP 2582032 A2 EP2582032 A2 EP 2582032A2
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EP
European Patent Office
Prior art keywords
voltage
inverter
input
power
unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12181824.9A
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English (en)
French (fr)
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EP2582032A3 (de
Inventor
An No Yoo
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LS Electric Co Ltd
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LSIS Co Ltd
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Publication date
Application filed by LSIS Co Ltd filed Critical LSIS Co Ltd
Publication of EP2582032A2 publication Critical patent/EP2582032A2/de
Publication of EP2582032A3 publication Critical patent/EP2582032A3/de
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/483—Converters with outputs that each can have more than two voltages levels
    • H02M7/49—Combination of the output voltage waveforms of a plurality of converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/12—Arrangements for reducing harmonics from AC input or output
    • H02M1/126—Arrangements for reducing harmonics from AC input or output using passive filters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC
    • H02M5/42—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters
    • H02M5/44—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC
    • H02M5/453—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/458—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M5/4585—Conversion of AC power input into AC power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into DC by static converters using discharge tubes or semiconductor devices to convert the intermediate DC into AC using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements

Definitions

  • the single phase full bridge inverter (123) synthesizes the AC output voltages with the voltages from the DC-link capacitor (122). IF the voltage of the DC-link capacitor (122) is assumed as 'E', an output voltage of the inverter (123) would be shown as 'E', 'O' and '-E' according to switching state.
  • the synthesized output voltage is 'E'
  • the synthesized output voltage is '-E'
  • the synthesized output voltage is '0'
  • An output line-to-line voltage of the motor from the synthesized output phase voltages may be synthesized in 13 steps of '6E', '5E', '4E', '3E', '2E', 'E', '0', '-E', '-2E', '-3E', '-4E', '-5E', '-6E', which may be generalized as below.
  • m 2 ⁇ H + 1
  • m is a level number of output phase voltage
  • H is the number of unit power cells (120) installed at each phase of motor (300)
  • p is the level number of output line-to-line voltages.
  • the conventional series H-bridge medium voltage inverter thus described suffers from a disadvantage in that, because it is formed with a diode rectifier for an input terminal of a unit power cell, it is impossible to perform a regenerative operation to make it difficult to perform a fast acceleration or a fast deceleration. As a result, the conventional series H-bridge medium voltage inverter thus described has a disadvantage of taking a long time for decelerated operation during a decelerated operation. Another disadvantage is that each capacitance of DC-link capacitor of all unit power cells must be enlarged to increase the size of an entire system. Thus, there is a need to address the abovementioned disadvantages.
  • the present disclosure is provided to solve the aforementioned disadvantages and it is an object of the present disclosure to provide a partial regenerative medium voltage inverter configured to combine a conventional series H-bridge medium voltage inverter with a regenerative unit power cell having an active rectifier capable of performing a regenerative operation. It should be emphasized, however, that the present disclosure is not limited to a particular disclosure, as explained above. It should be understood that other technical subjects not mentioned herein may be appreciated by those skilled in the art.
  • a regenerative medium voltage inverter comprising: a plurality of power cells configured to transmit, by serially-connected three groups, a phase voltage to a motor; a plurality of input filters interconnected between an input power unit and the power cell to reduce harmonics of a 3-phase input power; and a plurality of switching signal generating units interconnected between an input power unit and the power cell to switch a voltage inputted to the power cell.
  • the inverter further comprises a phase switching transformer electrically insulating the input power from the input power unit and providing the electrically insulated input power to each of the plurality of power cells.
  • the input filter is mounted with three input terminals receiving the input power, and comprises inductors respectively connected to the input terminals, and capacitors connected with the inductors in a delta connection.
  • first a second constituent element
  • first constituent element a first constituent element without departing from the scope and spirit of the present disclosure
  • first constituent element may be denoted as a second constituent element.
  • FIG.3 is a structural view illustrating a regenerative medium voltage inverter according to an exemplary embodiment of the present disclosure, where a series H-bridge medium voltage inverter is exemplified.
  • a regenerative medium voltage inverter (10) is an inverter that receives a voltage, whose rms (root mean square) value is over 600V in line-to-line voltage, from an input power unit (20) and supplies a 3-phase power to a motor (30).
  • the motor (30) is an induction motor or a synchronous motor but is not limited thereto.
  • FIG.4 is a detailed structural view illustrating an input filter of FIG.3 according to an exemplary embodiment of the present disclosure
  • FIG.5 is a detailed structural view illustrating an input filter of FIG.3 according to another exemplary embodiment of the present disclosure.
  • the input filter (12) includes inductors (51a ⁇ 51c) respectively connected in series to the 3-phase output of secondary winding side of the phase shift transformer (11) ⁇ To this end, the input filter (12) is formed with three input terminals ⁇ , capacitors (52a ⁇ 52c) connected to the inductors (51a ⁇ 51c) in delta connection, and damping resistors (53a ⁇ 53c) respectively connected in parallel to the inductors (51a ⁇ 51c).
  • the damping resistors (53a ⁇ 53c) serve to remove resonance in the input voltage, if the resonance is generated in the input voltage.
  • the power cell (14) includes an active rectifying unit (61), a DC-link capacitor (62) and an inverter unit (63).
  • An input of the active rectifying unit (61) is an output voltage of the input filter (12) of FIG. 3 , from which a DC rectified from the 3-phase voltage is outputted.
  • the active rectifying unit (61) includes six transistor switches (hereinafter referred to as switch, 61a ⁇ 61f), where the transistor is preferably an IGBT (Insulated Gate Bipolar Transistor), as shown in FIG.6 .
  • the DC-link capacitor (62) stores an input power of the active rectifying unit (61).
  • the inverter unit (63) is preferably a single phase full bridge inverter to synthesize output voltages form a voltage of the DC link in response to control of a controller (not shown).
  • the inverter unit (63) includes four switches (63a ⁇ 63d), and each switch is formed by connecting in parallel a transistor and a diode. Now, a circuit of FIG. 3 will be described in detail with an emphasis on a difference from that of FIG.1 .
  • the input filter (12) of FIG.3 configured as in FIG.4 or FIG.5 receives an output of the phase shift transformer (11), and inductances of inductors (41a ⁇ 41c or 51a ⁇ 51c) at the input filter (12) are sufficiently greater in value than those of leakage inductance of the phase shift transformer (11).
  • L filter > 2 ⁇ L leakage_ 2 ⁇ nd where, L filter is an inductance of inductors (41a ⁇ 41c or 51a ⁇ 51c) at the input filter (12), and L leakage_ 2 nd is a leakage inductance of the phase shift transformer (11) converted to a secondary winding side.
  • capacitance of capacitors (42a ⁇ 42c or 52a ⁇ 52c) of FIG.4 or FIG.5 may be obtained from the following relations.
  • C filter 1 2 ⁇ L filter ⁇ ⁇ c 2 where, ⁇ c is a cut-off frequency of input filter (12), and has a value six times greater than an input power frequency.
  • An input line-to-line voltage measured by the input filter (12) determines the switching of the active rectifying unit of FIG.6 , where a measured position of the voltage is situated between the phase shift transformer (11) and the input filter (12).
  • FIG.7 is a schematic view illustrating an input filter connected to a power cell in FIG.3 and a switching signal generating unit.
  • the switching signal generating unit (13) serves to generate a switching signal of the active rectifying unit (61). That is, the switching signal generating unit (13) measures an input line-to-line voltage from the 3-phase voltage inputted from the input filter (12), extracts an input power angle from the measured line-to-line voltage and transmits a gating signal, i.e., a switching signal to six transistors (61a ⁇ 61f) of the active rectifying unit (61).
  • a gating signal i.e., a switching signal to six transistors (61a ⁇ 61f) of the active rectifying unit (61).
  • FIG.8 is a schematic view illustrating a switching signal generated by the switching signal generating unit of FIG.3 and a resultant switching of an active rectifying unit according to an exemplary embodiment of the present disclosure, where the switching signal generated by the switching signal generating unit of FIG.3 in response to an input line-to-line voltage is exemplified.
  • 'V ab ' represents an ab line-to-line voltage
  • 'V bc ' represents a bc line-to-line voltage
  • 'V ca ' represents a ca line-to-line voltage
  • the switching signal generating unit (13) transmits ON/OFF signals relative to switches (61a ⁇ 61f) of the active rectifying unit (61) to each switch (61a ⁇ 61f) of the transistors.
  • the switching of the active rectifying unit has a same switching frequency as frequency of the input power.
  • switches of 61d and 61e of FIG. 6 are turned on, in a case the input power angle is from ⁇ /3 to 2 ⁇ /3, switches of 61a and 61d are turned on, and in a case the input power angle is from 2 ⁇ /3 to ⁇ , switches of 61a and 61f are turned on.
  • switches of 61c and 61f are turned on
  • switches of 61b and 61c are turned on
  • switches of 61b and 61e are turned on
  • switches of 61b and 61e are turned on.
  • the switching pattern is periodically repeated at every 2 ⁇ in response to changes in input power angle, by which the power cell (14) including the active rectifying unit (61) is enabled for bi-directional power transmission.
  • FIG. 8 has illustrated the switching of the active rectifying unit (61) relative to the input line-to-line voltage, it should be apparent to the skilled in the art that an identical operation can be made by measuring an input phase voltage, which will be explained later.
  • E a is an input 'a' phase voltage
  • E b is an input 'b' phase voltage
  • E c is an input 'c' phase voltage.
  • the switching of FIG. 8 may be also applied to the phase voltage, because the phase voltage can be obtained from the line-to-line voltage.
  • the active rectifying unit (61) is such that the switches (61a ⁇ 61f) are operated at a point same as that of diode of the diode rectifying unit (21) being operated, whereby the phase shift transformer (11) and the power cell (14) are electrically and instantaneously connected to enable a regenerative operation.
  • phase shift transformer (11) and the power cell (14) are connected by the switching of FIG. 8 , the following relationship occurs.
  • 'a' output voltage and current of a motor (30) may be defined by the following equations 14 and 15 respectively, and 'b' and 'c' output voltages and currents of the motor (30) may be also defined by the following equations 16, 17, 18 and 19 respectively.
  • ⁇ is a load angle
  • ⁇ is an operating frequency
  • t time
  • V o and I o are rms values of output voltage and output current.
  • Equation 20 power generated from 'a' phase of motor (30) can be obtained from the following Equation 20, and likewise, powers generated from 'b' phase and 'c' phase can be obtained from Equations 21 and 22.
  • the phase shift transformer (11) and the power cell (14) are instantaneously connected to allow a system to output a predetermined power, whereby a DC-link capacitor of unit power cell (14) can be reduces in size over that of the conventional medium voltage inverter.
  • the unit power cell having the conventional diode rectifying unit as shown in FIGS.1 and 2 has a ripple twice the operating frequency in the power outputted by each unit power cell as shown in Equations 20, 21 and 22.
  • the power cell (14) including the active rectifying unit (61) can advantageously reduce the size of the DC-link capacitor of each power cell (14), because an input terminal and an output terminal are instantaneously connected, a ripple power is not concentrated in the DC-link capacitor of each unit power cell, and a sum of 3-phase powers is available only in DC components as shown in Equation 23.
  • the regenerative medium voltage inverter have an industrial applicability in that regenerative operation is enabled by changing structure of input terminal of a unit power cell at a series H-bridge medium voltage inverter, and a dynamic braking resistor is not required to reduce the size of a DC-link capacitor over that of a conventional medium voltage inverter.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Control Of Ac Motors In General (AREA)
  • Rectifiers (AREA)
EP12181824.9A 2011-10-12 2012-08-27 Mittelspannungsmultizellenumrichter aus kaskadierten H-Brücken mit bidirektionaler Einspeisung der Zellen Withdrawn EP2582032A3 (de)

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Application Number Priority Date Filing Date Title
KR1020110104296A KR20130039612A (ko) 2011-10-12 2011-10-12 회생형 고압 인버터

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EP2582032A2 true EP2582032A2 (de) 2013-04-17
EP2582032A3 EP2582032A3 (de) 2014-05-28

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EP12181824.9A Withdrawn EP2582032A3 (de) 2011-10-12 2012-08-27 Mittelspannungsmultizellenumrichter aus kaskadierten H-Brücken mit bidirektionaler Einspeisung der Zellen

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US (1) US8922151B2 (de)
EP (1) EP2582032A3 (de)
JP (1) JP2013085453A (de)
KR (1) KR20130039612A (de)
CN (1) CN103051283B (de)

Cited By (3)

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EP3045343A1 (de) * 2015-01-16 2016-07-20 ALSTOM Transport Technologies Wandler für eine elektrische zuleitung und/oder substation zur rückgewinnung der bremsenergie
US9455651B2 (en) 2014-12-16 2016-09-27 Caterpillar Inc. Motor driver having integrated braking chopper
WO2022216279A1 (en) * 2021-04-07 2022-10-13 Siemens Aktiengesellschaft Regenerative multicell drive system with overlap angle in fundamental frequency modulation

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US9722503B2 (en) * 2013-03-28 2017-08-01 Teco-Westinghouse Motor Company Modular configurable multi-megawatt power amplifier
US9654021B2 (en) * 2013-10-09 2017-05-16 Rockwell Automation Technologies, Inc. Multifunction power converter with option for integrated magnetics
US10629396B2 (en) 2017-05-08 2020-04-21 Rockwell Automation Technologies, Inc. Arc flash resistant enclosure with segregated cooling
US10011178B1 (en) * 2017-06-08 2018-07-03 Ford Global Technologies, Llc DC inverter having reduced switching loss and reduced voltage spikes
US11038436B2 (en) * 2017-09-25 2021-06-15 Lsis Co., Ltd. Inverter system
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US10924025B2 (en) 2019-04-24 2021-02-16 Rockwell Automation Technologies, Inc. Regenerative cascaded H bridge power supply
US10651760B1 (en) * 2019-04-24 2020-05-12 Rockwell Automation Technologies, Inc Reduced semiconductor device power cell voltage drive
DE102020104252A1 (de) * 2019-05-21 2020-11-26 Vacon Oy Leistungswandler
JP7514778B2 (ja) * 2021-02-05 2024-07-11 株式会社豊田中央研究所 電源システム

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
US9455651B2 (en) 2014-12-16 2016-09-27 Caterpillar Inc. Motor driver having integrated braking chopper
EP3045343A1 (de) * 2015-01-16 2016-07-20 ALSTOM Transport Technologies Wandler für eine elektrische zuleitung und/oder substation zur rückgewinnung der bremsenergie
FR3031849A1 (fr) * 2015-01-16 2016-07-22 Alstom Transp Tech Convertisseur d'alimentation reseau et/ou de sous-station de recuperation de l'energie de freinage
US10554117B2 (en) 2015-01-16 2020-02-04 Alstom Transport Technologies Convertor for electric feeder and/or substation for recuperating the braking energy
WO2022216279A1 (en) * 2021-04-07 2022-10-13 Siemens Aktiengesellschaft Regenerative multicell drive system with overlap angle in fundamental frequency modulation
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US12539764B2 (en) 2021-04-07 2026-02-03 Innomotics Gmbh Regenerative multicell drive system with overlap angle in fundamental frequency modulation

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Publication number Publication date
CN103051283B (zh) 2016-02-17
KR20130039612A (ko) 2013-04-22
JP2013085453A (ja) 2013-05-09
US20130093376A1 (en) 2013-04-18
EP2582032A3 (de) 2014-05-28
CN103051283A (zh) 2013-04-17
US8922151B2 (en) 2014-12-30

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